List questions from unitary-matrices | MathQa

Do unitary matrices commute?

Published on 12 Jan 2025 - 18:06

Unitary and non-unitary

Published on 12 Jan 2025 - 17:30

Every matrix can be written as a sum of unitary matrices?

Published on 12 Jan 2025 - 22:40

Show that the eigenvalues of a unitary matrix have modulus $1$

Published on 12 Jan 2025 - 22:42

Trace inequality of the form $\operatorname{Tr}\Big(QMQ^f(M)\Big) \le \operatorname{Tr}\Big(QQ^Mf(M)\Big)$

Published on 12 Jan 2025 - 22:54

Fundamental group of $U(n) / \mathbb{Z}_m$

Published on 12 Jan 2025 - 22:24

Quaternions and $SU(2)$

Published on 12 Jan 2025 - 17:26

If $A$ and $B$ are unitarily equivalent, then $\sum_{i,j}|A_{ij}|^2 = \sum_{i,j}|B_{ij}|^2$

Published on 12 Jan 2025 - 22:49

Abelian subgroup of the unit quaternions

Published on 12 Jan 2025 - 22:26

What is U(1)/Z2 isomorphic to?

Published on 12 Jan 2025 - 18:16